Behavioral Design Patterns in C++ - Shapes Example - I

The video tutorial introduces the visitor design pattern, using a shape hierarchy as an example. It explains the need for the pattern to add operations like calculating perimeter or area without modifying existing classes, adhering to the open-closed principle. The tutorial outlines the implementation of a shape hierarchy, including classes for line and circle geometries, and discusses the addition of operations without the visitor pattern. The video concludes with a plan to introduce a hierarchy of visitors to represent new operations.

Explain the open-closed principle and how it relates to the visitor design pattern.

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What attributes are necessary for the line geometry implementation?

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